pnoltes commented on code in PR #470:
URL: https://github.com/apache/celix/pull/470#discussion_r1390458391
##########
libs/utils/src/celix_hash_map.c:
##########
@@ -339,21 +327,27 @@ static bool celix_hashMap_remove(celix_hash_map_t* map,
const char* strKey, long
visit = visit->next;
}
if (removedEntry != NULL) {
+ char* removedKey = NULL;
+ if (map->keyType == CELIX_HASH_MAP_STRING_KEY) {
+ removedKey = (char*)removedEntry->key.strKey;
+ }
celix_hashMap_destroyRemovedEntry(map, removedEntry);
+ if (removedKey) {
+ celix_hashMap_destroyRemovedKey(map, removedKey);
+ }
return true;
}
return false;
}
-static void celix_hashMap_init(
+celix_status_t celix_hashMap_init(
celix_hash_map_t* map,
celix_hash_map_key_type_e keyType,
unsigned int initialCapacity,
double loadFactor,
unsigned int (*hashKeyFn)(const celix_hash_map_key_t*),
bool (*equalsKeyFn)(const celix_hash_map_key_t*, const
celix_hash_map_key_t*)) {
map->loadFactor = loadFactor;
Review Comment:
Here are the hash function benchmark results (on my machine, using a release
build type and cpupower on performance):
hash1 is the long hash function used in celix_long_hash_map at the start of
this PR
hash2 is the long hash function used in the deprecated hashmap
hash3 is a altered long hash function which uses a prime.
I also had a short look into
[murmur3](https://github.com/logrhythm/MurMurHash/blob/master/src/MurMurHash.cpp)
and [FNV](https://github.com/fnvhash/libfnv/tree/master) hash, but for the
moment I think this requires too much work (technical and license wise)
# Hash1, max load 5
```
-----------------------------------------------------------------------------------------------------------------------------------------
Benchmark
Time CPU Iterations UserCounters...
-----------------------------------------------------------------------------------------------------------------------------------------
LongHashmapBenchmark_findEntryFromStdMap/10/process_time/real_time
0.432 ns 0.432 ns 1000000000 items_per_second=2.31246G/s
LongHashmapBenchmark_findEntryFromStdMap/100/process_time/real_time
0.433 ns 0.433 ns 1000000000 items_per_second=2.31041G/s
LongHashmapBenchmark_findEntryFromStdMap/1000/process_time/real_time
0.433 ns 0.433 ns 1000000000 items_per_second=2.31151G/s
LongHashmapBenchmark_findEntryFromStdMap/10000/process_time/real_time
0.434 ns 0.434 ns 1000000000 items_per_second=2.30551G/s
LongHashmapBenchmark_findEntryFromStdMap/100000/process_time/real_time
0.433 ns 0.433 ns 1000000000 items_per_second=2.31037G/s
LongHashmapBenchmark_findEntryFromStdMap/1000000/process_time/real_time
0.433 ns 0.432 ns 1000000000 items_per_second=2.30713G/s
LongHashmapBenchmark_findEntryFromCelixMap/10/process_time/real_time
2.38 ns 2.38 ns 293482551 averageNrOfEntriesPerBucket=0.625
items_per_second=420.077M/s nrOfBuckets=16 resizeCount=0
stdDeviationNrOfEntriesPerBucket=0.856957
LongHashmapBenchmark_findEntryFromCelixMap/100/process_time/real_time
2.64 ns 2.63 ns 268351618 averageNrOfEntriesPerBucket=3.125
items_per_second=379.474M/s nrOfBuckets=32 resizeCount=1
stdDeviationNrOfEntriesPerBucket=1.91621
LongHashmapBenchmark_findEntryFromCelixMap/1000/process_time/real_time
2.16 ns 2.16 ns 323130939
averageNrOfEntriesPerBucket=3.90625 items_per_second=462.94M/s nrOfBuckets=256
resizeCount=4 stdDeviationNrOfEntriesPerBucket=1.80467
LongHashmapBenchmark_findEntryFromCelixMap/10000/process_time/real_time
3.90 ns 3.89 ns 183397882
averageNrOfEntriesPerBucket=4.88281 items_per_second=256.477M/s
nrOfBuckets=2.048k resizeCount=7 stdDeviationNrOfEntriesPerBucket=2.20062
LongHashmapBenchmark_findEntryFromCelixMap/100000/process_time/real_time
2.38 ns 2.38 ns 294279918
averageNrOfEntriesPerBucket=3.75601 items_per_second=420.113M/s
nrOfBuckets=26.624k resizeCount=11 stdDeviationNrOfEntriesPerBucket=1.93968
LongHashmapBenchmark_findEntryFromCelixMap/1000000/process_time/real_time
2.62 ns 2.62 ns 270684694
averageNrOfEntriesPerBucket=4.98246 items_per_second=380.976M/s
nrOfBuckets=200.704k resizeCount=28 stdDeviationNrOfEntriesPerBucket=2.23419
LongHashmapBenchmark_findEntryFromDeprecatedMap/10/process_time/real_time
3.67 ns 3.67 ns 190401851 items_per_second=272.19M/s
LongHashmapBenchmark_findEntryFromDeprecatedMap/100/process_time/real_time
3.69 ns 3.68 ns 190481474 items_per_second=271.21M/s
LongHashmapBenchmark_findEntryFromDeprecatedMap/1000/process_time/real_time
3.69 ns 3.68 ns 189597715 items_per_second=271.084M/s
LongHashmapBenchmark_findEntryFromDeprecatedMap/10000/process_time/real_time
3.69 ns 3.68 ns 189618122 items_per_second=271.035M/s
LongHashmapBenchmark_findEntryFromDeprecatedMap/100000/process_time/real_time
3.69 ns 3.68 ns 189681903 items_per_second=271.169M/s
LongHashmapBenchmark_findEntryFromDeprecatedMap/1000000/process_time/real_time
3.67 ns 3.67 ns 190523011 items_per_second=272.179M/s
```
# Hash 2, max load 5
```
-----------------------------------------------------------------------------------------------------------------------------------------
Benchmark
Time CPU Iterations UserCounters...
-----------------------------------------------------------------------------------------------------------------------------------------
LongHashmapBenchmark_findEntryFromStdMap/10/process_time/real_time
0.428 ns 0.428 ns 1000000000 items_per_second=2.33786G/s
LongHashmapBenchmark_findEntryFromStdMap/100/process_time/real_time
0.427 ns 0.427 ns 1000000000 items_per_second=2.34001G/s
LongHashmapBenchmark_findEntryFromStdMap/1000/process_time/real_time
0.428 ns 0.428 ns 1000000000 items_per_second=2.33579G/s
LongHashmapBenchmark_findEntryFromStdMap/10000/process_time/real_time
0.427 ns 0.427 ns 1000000000 items_per_second=2.3403G/s
LongHashmapBenchmark_findEntryFromStdMap/100000/process_time/real_time
0.427 ns 0.427 ns 1000000000 items_per_second=2.34037G/s
LongHashmapBenchmark_findEntryFromStdMap/1000000/process_time/real_time
0.428 ns 0.428 ns 1000000000 items_per_second=2.33835G/s
LongHashmapBenchmark_findEntryFromCelixMap/10/process_time/real_time
2.56 ns 2.56 ns 272918800 averageNrOfEntriesPerBucket=0.625
items_per_second=390.34M/s nrOfBuckets=16 resizeCount=0
stdDeviationNrOfEntriesPerBucket=0.695971
LongHashmapBenchmark_findEntryFromCelixMap/100/process_time/real_time
3.76 ns 3.76 ns 186188393 averageNrOfEntriesPerBucket=3.125
items_per_second=266.203M/s nrOfBuckets=32 resizeCount=1
stdDeviationNrOfEntriesPerBucket=1.93245
LongHashmapBenchmark_findEntryFromCelixMap/1000/process_time/real_time
2.78 ns 2.78 ns 251731622
averageNrOfEntriesPerBucket=3.90625 items_per_second=359.86M/s nrOfBuckets=256
resizeCount=4 stdDeviationNrOfEntriesPerBucket=2.00366
LongHashmapBenchmark_findEntryFromCelixMap/10000/process_time/real_time
2.99 ns 2.99 ns 233585592
averageNrOfEntriesPerBucket=4.88281 items_per_second=333.894M/s
nrOfBuckets=2.048k resizeCount=7 stdDeviationNrOfEntriesPerBucket=2.14352
LongHashmapBenchmark_findEntryFromCelixMap/100000/process_time/real_time
3.00 ns 3.00 ns 233887362
averageNrOfEntriesPerBucket=3.75601 items_per_second=333.838M/s
nrOfBuckets=26.624k resizeCount=11 stdDeviationNrOfEntriesPerBucket=1.94674
LongHashmapBenchmark_findEntryFromCelixMap/1000000/process_time/real_time
2.99 ns 2.99 ns 234075293
averageNrOfEntriesPerBucket=4.98246 items_per_second=334.062M/s
nrOfBuckets=200.704k resizeCount=28 stdDeviationNrOfEntriesPerBucket=2.22839
LongHashmapBenchmark_findEntryFromDeprecatedMap/10/process_time/real_time
3.64 ns 3.64 ns 192084107 items_per_second=274.697M/s
LongHashmapBenchmark_findEntryFromDeprecatedMap/100/process_time/real_time
3.64 ns 3.64 ns 192187264 items_per_second=274.762M/s
LongHashmapBenchmark_findEntryFromDeprecatedMap/1000/process_time/real_time
3.64 ns 3.64 ns 192202353 items_per_second=274.977M/s
LongHashmapBenchmark_findEntryFromDeprecatedMap/10000/process_time/real_time
3.63 ns 3.63 ns 192491569 items_per_second=275.124M/s
LongHashmapBenchmark_findEntryFromDeprecatedMap/100000/process_time/real_time
3.63 ns 3.63 ns 192638166 items_per_second=275.242M/s
LongHashmapBenchmark_findEntryFromDeprecatedMap/1000000/process_time/real_time
3.63 ns 3.63 ns 193028763 items_per_second=275.699M/s
```
# Hash3, max load 5
```
-----------------------------------------------------------------------------------------------------------------------------------------
Benchmark
Time CPU Iterations UserCounters...
-----------------------------------------------------------------------------------------------------------------------------------------
LongHashmapBenchmark_findEntryFromStdMap/10/process_time/real_time
0.414 ns 0.414 ns 1000000000 items_per_second=2.4128G/s
LongHashmapBenchmark_findEntryFromStdMap/100/process_time/real_time
0.414 ns 0.414 ns 1000000000 items_per_second=2.41719G/s
LongHashmapBenchmark_findEntryFromStdMap/1000/process_time/real_time
0.414 ns 0.414 ns 1000000000 items_per_second=2.41582G/s
LongHashmapBenchmark_findEntryFromStdMap/10000/process_time/real_time
0.414 ns 0.414 ns 1000000000 items_per_second=2.41681G/s
LongHashmapBenchmark_findEntryFromStdMap/100000/process_time/real_time
0.414 ns 0.414 ns 1000000000 items_per_second=2.41521G/s
LongHashmapBenchmark_findEntryFromStdMap/1000000/process_time/real_time
0.414 ns 0.414 ns 1000000000 items_per_second=2.41732G/s
LongHashmapBenchmark_findEntryFromCelixMap/10/process_time/real_time
2.26 ns 2.26 ns 307909253 averageNrOfEntriesPerBucket=0.625
items_per_second=441.585M/s nrOfBuckets=16 resizeCount=0
stdDeviationNrOfEntriesPerBucket=0.856957
LongHashmapBenchmark_findEntryFromCelixMap/100/process_time/real_time
3.39 ns 3.39 ns 211113789 averageNrOfEntriesPerBucket=3.125
items_per_second=295.319M/s nrOfBuckets=32 resizeCount=1
stdDeviationNrOfEntriesPerBucket=1.86665
LongHashmapBenchmark_findEntryFromCelixMap/1000/process_time/real_time
2.48 ns 2.48 ns 281288298
averageNrOfEntriesPerBucket=3.90625 items_per_second=403.557M/s nrOfBuckets=256
resizeCount=4 stdDeviationNrOfEntriesPerBucket=2.16123
LongHashmapBenchmark_findEntryFromCelixMap/10000/process_time/real_time
3.31 ns 3.31 ns 211375732
averageNrOfEntriesPerBucket=4.88281 items_per_second=302.161M/s
nrOfBuckets=2.048k resizeCount=7 stdDeviationNrOfEntriesPerBucket=2.2035
LongHashmapBenchmark_findEntryFromCelixMap/100000/process_time/real_time
2.48 ns 2.48 ns 282405576
averageNrOfEntriesPerBucket=3.75601 items_per_second=403.207M/s
nrOfBuckets=26.624k resizeCount=11 stdDeviationNrOfEntriesPerBucket=1.92598
LongHashmapBenchmark_findEntryFromCelixMap/1000000/process_time/real_time
2.90 ns 2.90 ns 241719478
averageNrOfEntriesPerBucket=4.98246 items_per_second=344.381M/s
nrOfBuckets=200.704k resizeCount=28 stdDeviationNrOfEntriesPerBucket=2.23011
LongHashmapBenchmark_findEntryFromDeprecatedMap/10/process_time/real_time
3.54 ns 3.54 ns 197602959 items_per_second=282.865M/s
LongHashmapBenchmark_findEntryFromDeprecatedMap/100/process_time/real_time
3.54 ns 3.53 ns 197704646 items_per_second=282.885M/s
LongHashmapBenchmark_findEntryFromDeprecatedMap/1000/process_time/real_time
3.53 ns 3.53 ns 197684458 items_per_second=282.891M/s
LongHashmapBenchmark_findEntryFromDeprecatedMap/10000/process_time/real_time
3.54 ns 3.54 ns 197731536 items_per_second=282.88M/s
LongHashmapBenchmark_findEntryFromDeprecatedMap/100000/process_time/real_time
3.54 ns 3.54 ns 197896830 items_per_second=282.817M/s
LongHashmapBenchmark_findEntryFromDeprecatedMap/1000000/process_time/real_time
3.54 ns 3.54 ns 198110019 items_per_second=282.856M/s
```
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